<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on"
      label-position="left">
      <div class="title-container">
        <h3 class="title">后台管理员登录</h3>
      </div>

      <!--管理源账号-->
      <el-form-item prop="loginId">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input ref="loginId" v-model="loginForm.loginId" placeholder="输入管理员账号" name="loginId" type="text"
          tabindex="1" auto-complete="on" />
      </el-form-item>
      <!--管理员密码-->
      <el-form-item prop="loginPwd">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input :key="passwordType" ref="password" v-model="loginForm.loginPwd" :type="passwordType"
          placeholder="输入管理员密码" name="password" tabindex="2" auto-complete="on" @keyup.enter.native="handleLogin" />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>
      <!--验证码-->
      <div class="captchaYanzheng">
        <el-form-item prop="captcha" class="captchaInput">
          <span class="svg-container">
            <svg-icon icon-class="nested" />
          </span>
          <el-input ref="captcha" v-model="loginForm.captcha" placeholder="输入右侧验证码" name="captcha" type="text"
            tabindex="3" auto-complete="on" />
        </el-form-item>
        <div class="captchaImg" v-html="this.svg" @click="getCaptchaStart"></div>
      </div>
      <!--7天内免登录-->
      <div style="margin-bottom: 15px">
        <el-checkbox v-model="loginForm.checked">7天内免登录</el-checkbox>
      </div>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
        @click.native.prevent="handleLogin">登录
      </el-button>

    </el-form>
  </div>
</template>

<script>
import { validUsername } from '@/utils/validate'
import { getCaptcha } from "@/api/captcha" //该验证码需要开始created()就调用
export default {
  name: 'Login',
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error('Please enter the correct user name'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('The password can not be less than 6 digits'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        loginId: '',
        loginPwd: '',
        captcha: '',
        checked: true
      },
      loginRules: {
        loginId: [{ required: true, trigger: 'blur', message: "请输入管理员账号" }],
        loginPwd: [{ required: true, trigger: 'blur', message: "请输入管理员密码" }],
        captcha: [{ required: true, trigger: 'blur', message: "请输入右侧验证码" }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined,
      svg: ''
    }
  },
  watch: {
    $route: {
      handler: function (route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  async created() {
    this.getCaptchaStart()
  },
  methods: {
    async getCaptchaStart() {
      const result = await getCaptcha()
      this.svg = result
      // console.clear() //清空控制台
      // console.log(result) //拿到一个html类型
    },
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        // console.log(valid, "表单是否验证通过")
        if (valid) {
          this.loading = true
          // console.log(this.loginForm)
          if (this.loginForm.checked) {
            this.loginForm.remember = 7 //7天内免登录
          }
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            // console.log(this.loginForm)
            // 成功则跳转页面
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch((error) => {
            console.log(error, "<<<返回错误消息")
            if (typeof error === "object") {
              //账号密码错误
              this.$message.error('账号密码错误');
            } else {
              // 验证码错误
              this.$message.error('验证码错误');
            }
            this.loading = false
            this.loginForm.captcha = ''
            this.getCaptchaStart()
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  //验证码样式
  .captchaYanzheng {
    display: flex;
    justify-content: space-between;

    .captchaInput {
      width: 70%;
    }

    .captchaImg {
      width: 150px;
      height: 50px;
      //border: 1px solid;
    }
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
